Nice. That cmds way is probably better, unless you're using PyMel already.
"findRelatedSkinCluster" is a MEL script (you can find it on your PC) that
works much better than my simple "listRelatives" call.
I had forgotten about cmds.skinPercent.
I'm suspicious of "objName = cmds.listRelatives(cmds.ls(rsSlVtx, o=True),
p=True)" though. At the very least, it's impenetrable using those MEL
abbreviations for all the switches.
Apparently
cmds.ls(rsSlVtx, objectsOnly=True)
returns the object (ie shape node) names for any supplied components. I
didn't know that :)
The outer part ("cmds.listRelatives(...), parent=True)") returns the parent
of that shape. That seems unnecessary to me since the skin is bound to the
shape. The only time it could make a difference is if the shape is
instanced, and the script makes no effort to handle that anyway.
You probably want to add a filterExpand command on your vertex list, to get
rid of non-vertices, and to expand grouped verts into individual verts.
Otherwise the skinPercent command will fail on those.
On Friday, 13 April 2018 06:36:11 UTC+10, Eugene Flormata wrote:
>
> cool! thanks!
>
> I actually posted in the autodesk forum too and I got an interesting
> snippet there too, so I thought I'd post that here
>
> https://forums.autodesk.com/t5/maya-programming/how-can-i-find-a-bone-from-a-vertex/m-p/7927115
>
>
> thanks for the help!
>
>
>
> On Wednesday, 11 April 2018 14:58:40 UTC-7, Michael Boon wrote:
>>
>> PyMel is probably the most straightforward because you can use the API
>> command influenceObjects and then read the weightList from an attribute.
>> Using the API would be much faster if your rig is complex.
>> Using cmds...I'm sure someone else knows how to get the influence objects
>> from an attr. It's not something I've ever had to do.
>>
>> Here's a PyMel example. With a couple of verts on a cylinder selected:
>> import pymel.core as pm
>> vert = pm.selected()[0]
>> mesh = vert.node()
>> sc = mesh.listHistory(type='skinCluster')[0] # Note this is not a great
>> way to get skinClusters in general, but it works in simple situations.
>> infs = sc.influenceObjects()
>> print vert
>> print mesh
>> print sc
>> vId = vert.currentItemIndex()
>> print 'Vert:', vId
>> for jId in xrange(sc.numInfluenceObjects()):
>> print '\t', infs[jId], pm.getAttr(sc.weightList[vId].weights[jId])
>> prints
>> pCylinderShape1.vtx[16:17]
>> pCylinderShape1
>> skinCluster1
>> [nt.Joint(u'joint1'), nt.Joint(u'joint2'), nt.Joint(u'joint3'), nt.Joint(
>> u'joint4')]
>> [0, 1, 2, 3]
>> Vert: 16
>> joint1 0.0163752022203
>> joint2 0.933793770143
>> joint3 0.0495594248894
>> joint4 0.000271602747264
>>
>>
>>
>>
>> On Thursday, 12 April 2018 05:23:52 UTC+10, Eugene Flormata wrote:
>>>
>>> does anyone know if it's possible to find a bone from a mesh vertex in
>>> python?
>>>
>>> I've found links to code for finding the polygons effected from a bone
>>>
>>> http://polycount.com/discussion/140109/melscript-python-selecting-influenced-polygons-from-a-joint
>>>
>>> but I'm having trouble finding the right command in reverse
>>> maybe getting a list of bones affecting one vertex, or the bone with the
>>> most weight
>>>
>>>
>>> any help would be great
>>> thanks!
>>>
>>
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